llvm-project

dd734842 - [libc++][NFC] Use forward declarations in {in,}out_ptr.h (#176341)

[libc++][NFC] Use forward declarations in {in,}out_ptr.h (#176341) This doesn't improve compile times currently, but it does make it clear that we don't need the definition of `shared_ptr` or `unique_ptr` for `{in,}out_ptr`. It also reduces compile times quite a bit if we ever use these utilities in another header.